Golf Course Management

APR 2014

Golf Course Management magazine is dedicated to advancing the golf course superintendent profession and helping GCSAA members achieve career success.

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04.14 GOLF COURSE MANAGEMENT 101 GCSAA research funding for 2014 GCSAA has selected three new research projects for funding in 2014. The research funds are made available to GCSAA through a block grant from the Environmental In - stitute for Golf. The projects are: "Insecti- cide-resistant annual bluegrass weevil: Un- derstanding, managing and preventing a superintendent's nightmare" by Albrecht M. Koppenhöfer, Ph.D., and Olga Kostromytska, Ph.D., Rutgers University; "Use of giberellin synthesis-inhibiting plant growth regulators for the prevention of Acidovorax avenae infec - tion of creeping bentgrass," by T. Karl Danne- berger, Ph.D., and David S. Gardner, Ph.D., Ohio State University; and "Effect of golf course turfgrass management on water qual - ity of non-tidal streams in the Chesapeake Bay watershed," by Erik Ervin, Ph.D., and Stephen Schoenholtz, Ph.D., Virginia Tech. GCSAA is continuing to support two projects selected for funding in 2013. Kevin Frank, Ph.D., and Emily Merewitz, Ph.D., at Michigan State University are studying drought and traf - fc stresses on creeping bentgrass, and James Murphy, Ph.D., and Bruce Clarke, Ph.D., at Rutgers University are examining the infu - ence of best management practices on control of anthracnose disease in annual bluegrass turf. Four additional studies funded in 2012 are in various stages of completion. The results of all of the GCSAA-funded research will be published in the research section of GCM. — Mark Johnson (mjohnson@gcsaa.org), GCSAA as - sociate director of environmental programs Giberellin synthesis-inhibiting PGRs vs. Acidovorax Acidovorax avenae has been identifed as a pathogen that causes bacterial disease on highly maintained creeping bentgrass (Agrostis stolonifera), but little is known about the disease and its treatment or control. We will evaluate chemical prevention of A. av - enae to further our knowledge of what allows A. avenae to infect creeping bentgrass and how we can prevent it. We will also evaluate whether soil moisture plays a role in the infec - tivity of A. avenae. Experiment I will include feldwork on a golf course that has experienced an outbreak of the disease. Treatments will in - clude trinexapac-ethyl, paclobutrazol, Daco- nil Action, Daconil Ultrex and an untreated check. Multiple growth chamber studies will test the effects of varying moisture levels. Turf quality, presence of pathogen, disease occur - rence and clipping yield (feld only) will be measured weekly. Experiment II will evaluate whether cutting height and physical wound - ing makes the turf more susceptible to this dis- ease. All feld experiments will be conducted for two growing seasons, beginning in spring and ending in fall. Growth chamber studies will be repeated twice. The proposed research may help contribute to a greater understand - ing of the conditions that allow A. avenae to become an infective pathogen of creeping bentgrass and how those conditions can be prevented. The knowledge gained from these experiments will help us design future studies to investigate the role of cytokinins and patho - genesis-related proteins in creeping bentgrass health and susceptibility to bacterial infection. This research should allow us to make better recommendations for cultural and chemical means of preventing and/or controlling A. avenae on creeping bentgrass. — T. Karl Danne- berger, Ph.D. (danneberger.1@osu.edu), and David S. Gardner, Ph.D., The Ohio State University Teresa Carson (tcarson@gcsaa.org) is GCM 's science editor. CUTTING EDGE Teresa Carson Photo by Scott Hollister Photo by T. Karl Danneberger The research described in these summaries is funded in part by the Environmental Institute of Golf. 090-101_April14_TechwellCuttingEdge.indd 101 3/18/14 2:54 PM

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